Disk tiller



Feb. 16, 1954 w. vvl-l. SILVER ET AL DISK TILLER Filed Oct. 9, 1948 9 Sheets-Sheet l Inventors -WALTER H. SILVER N JOHN I. CANTAL Filed Oct. 9, 194a Feb. l6, 1954 w, HJSIL'VER ET L 2,6 9,

DISK TILL-ER 9 Sheet's-Sheet 2 fizz/anions:

WALTER H..SILVER 4 JOHN I. CANTRAL' ATTORNEYS Feb. 16, 1954 w. H. SILVER ET AL DISK TILLER 9 Sheets-Sheet 3 Filed Oct. 9. 1948 I WALTER H. SILVER JOHN l. CANTRAL Feb. 16, 1954 w. H. SILVER ETVAL DISK TILLER 9 Sheets- Sheet 4 In z/en ors:

WALTER H. SILVER ATTORNEYS JOHN l. CANTRAL Filed Oct. 9, 1948 Feb. 16, 1954 w, H. SILVER ET AL 2,669,171

DISK TILLER 9 Shee'ts-Sheet 5 Filed 0ct 9, 1948 ffzvenifors.

WALTER H. SILVER JOHN l. CANTRAL Feb. 16, 1954 W. SILVER ET AL DISK TILLER 9 Sheets-Sheet 6 Filed Oct. 9, 194s WALTER H. SILVER JOHN I. CANTRAL BY ATTORNEYS Feb. 16-, 1954 W. H- SILVER ET AL DISK TILLER 9 Sheets-Sheet '7 Filed 001;. 9, 1948 WALTER H. SILVER JOHN l. CANTRAL ATTORNEYS 1954 w. H. SILVER ET AL ,669,1

\ DISK TILLER I Filed Oct. 9, 1948 I 9 Sheets-Sheet 8 I I F." 452 351 463 INVENTORS WALTER H. SILVER JOHNI. CANTRAL Feb. 16, 1954 w. H. SILVER ET AL DISK TILLER Filed Oct. 9, 1948 FIG. l5

9 Shets-Sheet 9 v g 4e| Hale a I I l 325 312 39s I 352 3 3 4;;(O9/i/ 38ll {II/430 SA 3 5 35| I I FIG. I8

I mmvroxs WALTER H. SILVER JOHN L CANTRAL ATTOR EYS Patented Feb. 16, 1954 DISK TILLER Walter H. Silver and John I. Cantral, Moline, Ill., assignors to Deere &' Company, Moline, 111., a corporation of Illinois Application October 9, 1948, Serial No. 53,716

This application is a continuation-in-part of our co-pending application, Serial No. 742,234, filed April 18, 1947, for Disk Tillers.

The present invention relates generally to agricultural implements and more particularly to ground working implements of the type commonly known as disk tillers.

The object and general nature of the present invention is the provision ofa novel disk tiller having exceptionally large capacity and which is adapted to work a strip of ground much wider than conventional disk tillers. More particularly, it is a feature of this invention to provide a disk tiller or similar implement having a plurality of ground working units, each of which is flexibly mounted so as to operate effectively over ground which is uneven or rough. More specifically, it is an important feature of this invention to provide a ground working implement having a plurality of gangs of disks, wherein .3

end so as to work the ground at a uniform depth irrespective of humps, hollows or other surface irregularities.

It is also an important feature of this invention to provide means, while accommodating the above mentioned flexible mounting of the disk gangs, especially constructed and arranged to appiy downward pressure against the ends of the disk gangs so as to act to force them down into their working position or hold them in a working position. It is an additional feature of this invention to connect the disk gangs in axial alignment so that any tendency for one end of each gang to run too deep is offset by a connection to the adjacent end of the adjacent gang so as to secure thereby substantial uniformity of operation. Specifically, the gang units, which are ordinarily arranged diagonally, have their front and rear ends connected, respectively, with the rear and front ends of the next adjacent gangs, whereby the several gangs may float with respect to the supporting frame but without having either end of any one gang run too deep or too shallow as compared with the other end of that gang.

Another important feature of the present in-'- vention is the provision of a new and improved I, the provision of a disk tiller having a plurality 14 Claims. (CI. 97-53) of gangs of disks arranged in individually mov able relation but interconnected endwise, and a still further feature of the present invention is the provision of a sectionalized frame in which each gang of disks is mounted on its own frame section, in conjunction with detachable means interconnecting the disk sections and detachable connecting means between the frame sections, whereby the size of the implement may be increased or decreased by adding or taking away one or more of the disk sections and the associated frame section.

These and other objects and advantages of the present invention will be apparent to those skilled in the art after a consideration of the following detailed description, taken in conjunction with the accompanying drawings.

In the drawings:

Figure 1 is a plan view of a tractor drawn disk tiller, in which the principles of the presentinvention have been incorporated.

Figure 2 is an end view, showing the rear or outer end of the disk tiller and the land and furrow wheels therefor.

- Figure 3 is an end view at the front of the tiller, showing the front land wheel and associated parts.

Figure 4 is a rear view of the tiller, looking forwardly generally along the line 44 of Figure 1.

Figure 5 is a sectional view taken generally along the line 5--5 of Figure 1, and showing the draft and bearing connections between the tiller frame and the disk gang units.

Figure 6 is a detail view showing the interconnection between contiguous end portions of adjacent gangs.

Figure 7 is a detail view of the raising and lowering rod connection.

Figure 8 is an enlarged fragmentary perspective showing the hydraulic cylinder mounting parts, with the cylinder detached.

Figure 9 is a fragmentary view showing a modified rear end construction.

Figure 10 is a modified view of the front portion of a disk tiller showing a crank screw operated lift instead of a power unit operated lift.

Figures 11 and 11A are complementary plan views, showing a modified form of disk tiller, in which the disk gangs are mounted on individual frame sections so as to provide for adding or substracting one or more of such sections and the associated disk gang or gangs for increasing or decreasing the size of the implement.

Figure 12 is a fragmentary perspective view of the forward or furrowward end of the disk tiller of Figures 11 and 11A.

Figure 13 is a sectional view taken along the line l3l 3 of Figure 11A.

Figure 14 is a fragmentary sectional view taken along the line l4l 4 of Figure 11A.

Figure 15 is a fragmentary perspective of one end of the rear frame arm supporting the rear furrow wheel.

Figure 16 is a detail view of the front furrow wheel support.

Figure 17 is a detail view showing the connection between the ends of adjacent lift rods.

Figure 18 is a fragmentary'plan view of the implement frame, showing the frame with one frame section and the associated disk gang section removed for the purpose-30f reducing the width of cut.

Referring first to Figure 1, one form of implement in which the principles of the present invention have been embodied, and illustrated in the drawings by way of example, is a disk tiller comprising a plurality of gangs of disks A, B, etc;, each gang made up of a plurality of disks 'I mounted on a gang bolt 2- and held in spaced apart relation by spools or spacers 3, and at the ends of each gang bearing means are provided which will be described in detail below.

The gangs ofdisks are supported in a flexible manneron a mainframe that is indicated in its entirety by: the reference numeral The frame 5 is made up of a diagonally disposed tubular member 6, preferably of round pipe stock, and a generally fore and aft tubular member 1', also preferably formed of round pipe stock. The rear end of the main tubular member 8 has a bifurcated section 8; the upper and lower arms of which are spaced apart vertically and apertured' to receive a pivot'pin 9 which connectsthe member 6 swingably with the member 1. To this end, the central portion of: the member I may carry a vertical bearing bushing H (Figure 2) or other suitable construction to re-- ceive the pivot pin 9.

A bracket I5 is fixed to the forward endof the landward frame member 1 and includes a rear vertical portion 16 that is secured; as by welding, to the front end ofthe member '5 and an upper or forwardly extending section H, to the forward portion of which a sleeve [8- is-fixed, asby welding, andreenforced by a-pair of gusset plates ill or the like. Aland wheel 2:! is carried at the lower endof a support 22, the upper and forward portion of which is formed as a spindle 23 and rotatably disposed in thesleeve '18. Upper and lower setscrew collars 24 and 25 are employed for holding the-spindlein position while accommodating full castering of the land wheel 21. A rear furrow wheel support. 2'! is adjustably connected at its forward end to therear end of: the landward frame member 3' and carries a sleeve 28 in. which the spindle 2-9 of a rear furrow. wheel axle 31 is received. The axle 3| includesa downward and furrowward-extension onwhich a rear furrow wheel 32 is mounted, and the spindle portion 29 is provided-with an. arm 34 securedtheretoand apertured at its outer end to receive an adjusting link 35 which preferably is made up of two telescopically associated sections 36v and 31, the latter being pivotally connected in any suitable way tothe rear end of the landward'frame memher 1, preferably by means of a plate 38.Which is welded to the support 27 andhasa plurality ofapertures 39 receiving, a bolt 41 which is car- 4 ried by the frame member I and which accommodates disposition of the furrow wheel support 27 in different angular positions, whereby it is possible to set the furrow wheel 32 in different positions relative to the frame 5. The link section 36 is pivotally connected at its outer end to the arm 34.

The forward end of the diagonal framemernber fiis'supported'ona forward furrow wheel 45 which is journaled on the lower end of an axle member 46, the upper portion 47 of which is formed asa spindle to receive a sleeve 48 that is carried by the upper forward end of a front wheel support member or bracket 59. The latter may be; fixed to the front end of the frame member 6 in the'same manner as described above in connection with the land wheel support bracket I5, but preferably the position of the front wheel 45 may be adjusted laterally, and to this end the front end of the main frame member 6 carries a sleeve section 52. which receives the lower and rear portion of the bracket 39, the latter being suitably. held. in the member 52 in different positions of adjustment by any suitable locking means, such. as a set screw 53. or the like. If desired, the land wheel support member l5 may be connected to the front end of the frame. member 7 in the manner just described for. the bracket' 49. The upper portion of the spindle carries setscrew collars 55 and 56 (Figure 3) at the'upper and lowerends of the sleeve sections 39,. whereby the front wheel 45 may. caster. Also, the vertical position of the frame relative to the wheels 2| and 45 may be adjusted by loosening, the set screw collars 55 and 56' and shifting them into different positions so as to carry-the frame at higher or lower positions, as desired. Generally it not necessary to adjustv the vertical position of; the furrow wheel 32,. but if so desired, the spindle portion 29 of. the axle member 31 may likewise carry set screw collars. at opposite ends of the sleeve section 28. The link member 3,? preferably carries an adjusting set screw clamp-collar 51 which; provides for changing the effective length of the link member 35 so as to change the lead of the rear furrow wheel 32.

The implement frame 5' may be connected to a propelling tractor T byany suitableihitch construction, .butzpreferably, according to the princitples ofv the present: invention, arelatively heavy draft member 6 I isconnected by upper and lower plates. 62, and 63 to a draft stud 64 welded to the: generally centralportion of the main frame member 6. The. stud 6411s apertured to receive a draft pin 65 which passes through apertures in the rear ends of theplates 62 and 63. Preferably, the. latter plates are bolted to the. rear end of the main draft member Bl. Theforward end of the draft members-l is connected to the-drawbar H ofthe tractor T by a similar construction, embodying upper and lower plates I2 and. 13 aperturedj to receive-a hitch pin, 14 that connects the frontend of the hitch member 6: to the tractor drawbar 11.. The plates 12'and-l3-preferably' are boltedto'the front end of the hitch member 51'. Thelatter member is provided with atransverse clip'8l apertured at its opposite ends to receive the downturned ends of angle adjustingrods 82 and 83. The rear end. of the hitch rod 82 is received-telescopically ina tubular member 8'6. that is pivotally connected in any suitable way to the forward portion of the main framemember 6., and the rear end of the other hitch ,rod183. is. likewisereceived in a. tubular spear-r1- 5, member 81 that is pivotally connected to the rear portion of the frame member 6. Clamping set'screw collars 88 are provided for holding the members 82, 86 and 83, 81 in different positions of adjustment.

Reference was made above to the fact that the disks gangs A, B, etc., are flexibly connected with the main frame of the implement. These connections will now be described. I

Referring particularly to Figure 5, a plurality of transverse bearing sleeves 9I are secured, preferably by welding, to the underside of the main frame pipe 6, and a plurality of companion bearing sleeves 92 are secured to the disks gangs, one for each end portion of each gang. Preferably the gang bearing sleeves 92 are secured directly to the associated gang shaft bearing member 93 as by bolts 94 extending downwardly through openings in the upper portion of the bearing member 93 to which the the bearing sleeve 92 is welded, the member 93 constituting a part of the associated disk 'gangbearing which is indicated in its entirety by the reference numeral 96. A channeled lug 98 is welded to one end of the bearing sleeve 92 and receives a standard It". The upper end of the latter is apertured to receive a bolt I02 which extends through a pair of clamping members I03 and I04 between which a scraper support angle I65 is disposed. Scrapers of any suitable construction are mounted on each support angle I05.

A bail member III! is provided for the rear end of each of the disk gangs A, B, etc., and a similar bail member III is provided for the forward end of each of said disk gangs. Each rear bail member II9 comprises a generally horizontally disposed arm having its forward end bent forwardly, as indicated at I I3, and disposed within the associated main frame bearing sleeve 9|. The rear end of the arm member is bent rearwardly, as at H4, and is disposed in the associated disk gang bearing sleeve section 92. Each end of the bail arm is apertured to receivea cotter IIB which, in conjunction with a thrust washer II1, serves to hold the bail in place and take all draft pull transmitted between the frame and that end of the disk gang. The other bail or arm III which connects the other end of each gang to the main frame 5 is of similar construction, embodying a bail having a forwardly turned end I22 rockably disposed in the cooperating bearing sleeve section 9| carried by the main frame pipe member 5. The other end of the arm III carries a generally rearwardly directed section I23 which is received by the cooperating bearing-section 92 mounted on the disk gang bearing unit in the same manner as described above. The several arms III employ generally vertically extending sections I26 which are apertured, as at I21, at their upper ends, and the several companion arm or bail members IIIl are provided with generally upwardly extending arm sections I28 which are also apertured at their outer ends, as at I29, and are also provided with a pairof apertures to receive bolt or rivet means I3I connecting a hammer strap I32 thereto (Figure '7). The outer end of the hammer strap I32 is apertured, as at I35, and the apertures I29 and I35 of each arm or bail member II I pivotally carry a sleeve I4I swiveled by trunnions I42 and I43 received, respectively, in the apertures I29 and I35. As best shown in Figure 6, thebail member III) connected with the rear end of one gang is connected with the forward end of the next rearward gang by a link I46, theends of which are apertured and are which connects the link I46 with the upwardlyextending arm section I26 on the associated bail member I I I.

Thus, by virtue of the links I46 and associatedparts, we have provided a plurality of disk gangsconnected together in generally axial relation whereby each gang may have floating action more or less independently of the other gangs but with the rear end of each gang connected to the forward end of the adjacent gang whereby the adjacent ends of the gangs rise and fall to- I gether, yet the entire assembly of interconnected disk gangs move upwardly or downwardly so as to accommodate uneven ground and the like.

A generally longitudinally shiftably raising and lowering rod member it!) is carried in the SBV-r eral sleeves MI, and the rod member I66 may, if desired, be made up of a plurality of rod sections IEI interconnected at their end by connecting sleeves I52 bolted, as at I63, to the rod sections I6I. The raising and lowering rod member I66 carries a compression spring I65 on the forward side of each of the swiveled sleeves Isl, and an adjustable set screw collar I66 is disposed on the rod member so as to form an abutment receiving one end of the compression spring I55, the other end of which bears directly against one end of the associated swiveled sleeve I 4|. Preferably, the interconnecting collars I62 are disposed on the rearward or landward side of each of the swivel sleeves I4I whereby when the rod member IE9 is moved to the right (Figures 1, i and 6), the interconnecting sleeves I62 engage the associated swiveled sleeves I M and serve thereby acting through the bail connecting links M6, to rock all of the bails III! and III in a direction to raise the disk gangs out of engagement with the ground and into a transport position. By moving the rod member I69 in the other direction, the disk gangs are lowered into operating position and, if the rod member I69 is forced landwardly, the springs I65 are compressed and apply a yielding downward pressure against the bails for yieldably holding the disks to their work. I Also, the yielding of the springs I65 when the implement is arranged for operation permits the disk gangs more or less individually to rise and fall when passing over uneven ground.

According to the principles of the present invention, we provide hydraulically operated means for shifting the raising and lowering rod I69, and

to this end a cylinder support bracket I18 is forward end I15 apertured to receive a quick detachable pin I16 (Figure 1) connected to the forward end of the hydraulic piston and cylinder unit I11 thereto. power unit I11 is connected by a quick detachable pin I19 to a link MI pivotally mounted, as

as I82, on a bell crank lever I89. Preferably, the bell crank lever I83 includes a vertically -dis posed pivot pin I85 welded to the main arm member I86 and also welded to a short bar I81 The rear or piston end of the anemia:

lever member I86 A: pin- I91? (Figure. 19'. when;

inserted through the: registering openlng's- I91, I92 and I 93-10mm the: parts together. The: outer end oft'he lever II iis apertur'ed-,.as at I- B-E to re:- ceive the rear quickdetachable pin 1' 1 9 connect ing the. cylinder unit Illi to" the arm m... The: other" end of the bell crank. lever I 83: carries a: swivel-ed sleeve 2M through: which the forward or'the raising and lowering-rod member. I 60 passes-and a: pair of. set'screw collars 203 are: fixed to: the lifting rod-1 section and. form the:

means. whereby oscillation? of the hell 1 crank lever F83 shifts the raising and lowering: member I60; in' one: directionor the other. When the pin I 25 isinplace, connecting the'swinging arm I81 witli--'the;be1l crank lever I83, the cylinder I ltl may ber'etracted or'extendedtooscillate the bell crank lever. I 83 bypowersinzone direction or'the; other; raising or' lowering. the disks. The-pin I85 or the"; bell; crank: lever I 83.= is received? in .a. verti'cal sleeve 20d welded to the front portion oi theimain frame pipe 6.

In Figure Qwehave showrramodified rear. end

construction wherein the forward downturned' end 225' of a-rearfurrow wheellaxle member 225 is disposed irrthev rear bifurcated section-8 of thezmainr pipe memberfi. The axle member 226 extendsrearwardly and carries a pair" of upper and lower bracketsl228ito=which a vertical bearing sleeve: 229:: isv fixed, as by welding; Thesleeve: 229- receives" the spindle-3I of. the; rear furrow wheel;.. and; the angle or lead of the latter'isads justed, in thistiorm: of; the invention, in substantiallythe same way as described above*,.namely;. bya telescopically associated pair of link mem hers -35. pivotally. connected rearwardly to the steeringarmzcM an'dattheir forward ends toa h1g1? I" fikedastbycwel'ding, to the'rear axle meme ber 22.6. Thelateral; position of" therear: end of the axle". member: 226' is adjusted by means or'a' limit. 233-; the rear end of which .is turned. upward ly; and: disposed. in. an: apertured lug 234iwelded'to therear axle member 225, the forward end. of i i the; link being threaded and extendedzthrough an opening; inian angle mg 235- that. is welded: to' theupper" side of the main. pipe member E Locknut's 123E; serveto'holdthe link 233= in dif ierent: positionsrof adjustment.

Also, instead of1or in addition to the setscrew 53 (Figure. 4), the front'axle member" 49 may b held:- in. different positions of lateraladjustment by means ofxan: arm andlink construction substantially the: same as the members 2.33:.and.

234 and: associated parts, asjust described.

The. form. of the invention shown in Figure 9. also-includes. a modified form: ofiland. wheelsupport which will now be described. A land axle bracketlSI-i includes an L-shaped bar 252 hav ing itsirearendturned downwardly and secured, asby welding, in a pa-ir of brackets .253 that are. weldedto. theiorwardislde of the pipe: member;- 6. Thezmaimportion: of the bracket member 2 52:12-

tends. forwardly andreceivesa pair of.- lugs-2255:

tor-mare welded; to the lower end. of? a; spindle.

receiving 'sleeve- 2159.. The sleeve 25fiireceivesatha. spindle section: 25:! of a land axle. member-1258;; upon which the land Wheel 259 is.jonrnale.c1i. A.

pair of:= set screw collars:.2-B'l..* serve to.- hold-the spindle? section. 251:. different. verticalpositions: Itawill:bernoted;thatainuthiszformtofs:the-invention;

the land wheel z5a issdisposed; enerally toward; 1 the.-;..intermediateiaportion' of: .the:;f rame.. thereby providing. .ior. support of: the latter.- at}. a. point. between its; ends. This serves to} prevent; undue.

sagging: of:the=frame.--durins; transport; whenthe.

weight-ofathe;plurality of games; is sustained by thesframea.

Fornsetraetorslthat do not. include; a remote hydraulicrcyllnder, .we' provide- ;a'. crank: screw: or hand. operated typerof lift which will.-

nowl be; described. Referring. nowto Figure. l0,v auipindfi forming a. part: of abe1l;cr.ank.lever 2 16 is. received by: the; vertical sleeve 2 06 that, is fixedto thefrontportion of. thamaim frame-pipe;

B. The. bellcrank lever; 21-6: includes; a. hammer.

strap- 218,- which. is: apertured together with the.

adjacentv portionpf the bell crank. arm section. 21 91. to. i which the; hammer: strap islfi-xed thereby forming means for receiving. the,-.trunnion. .sec-

tionsrzfil of: a depth screw. housing member. 282. Theother arm section 285.. oithe, bell. crank... 216,

receives a. swivel member. 286, through. which the. forward end of the. raising. andilowering. rod member I 60 passes. being held... proper relationwith respect. thereto by thesetscrew collars 2llilimentionedabovev .The-h0using.memb.er 2.82. receives a nut (not. shown). .whichreceivesthe. rear threaded. end of the. depth screwadjnstihg crank.2.81-. the. forward portion of. which is journaledlfor. rotation. in. a. swivel 289, the. trunnions 2.9L ofwvhicl are re.-

ceived inthe. upper or forward apertured.ends.

of. a. pair or. bracket. straps. 2.9.3 that are. bolted tov thesupport. bracket. fill in. placeof j the cylinder. support member. I14? described above. Turning the. crank screw 287,. in one. direction. or the other swings. the bellicrankfiZ'lli and. thus. raisesor lowers the disks. in. substantially the same way as described above inconnectionj with the. form of the implement: using the hydraulic cylinder.

In this form of the'invention thefront axle member 49a is heldin' different positions. of lat:-

" eral adjnstment' by'means of an arm arr welded to the rear portiontof the front axle member 49 and an. adjustable link member 3'02 connected between the end oi the arm13llI" andan' apertured lug 3llil on the-main frame member '6'; Preferably, the adjustable link' structure 382 includes a; pair of telescopically associated sections 38.5 and 30B held in different positions by'a set" screw collar-3.0.1.1 Also in this" form the front end of the'plpeS is notched; as at3'08, to receive thes-leeve 3ll'9-,.welcled-' thereto, iii-which the-axle 49w is' 'disposedfor lateralswing ing'.

Figures 11" et seq. show another modified formof the present invention inwhich the construction issuch that the; tillermay be increased ordecreased in length-so as to provide Iorincreasingor decreasingthe amount of land worked;

Referring; first t'o' Figures 1 1 and 1 1A,- tlie reference numeral 311] indicates a main frame; or support, which-isgenerally in the: form of'a-pipe member, made upof a rearpipe section 3| I, a

front pipe section -3 l2 and one on more inter-- mediate-=- pipe sections 3 I 3. Eachz of the pipe or frame sections-3 I1 and? 312: andatheaintermediatez pipe sectionsrfl-h are. preferably of .sucha length that, .whemtha implement. is. diaassemblediltransportation, as in ordinary farm trailers or trucks ranged, as best shown in Figure 13, to receive coupling bolts 323. At th forward side the pipe member 3|5 is provided with a land axle arm bracket 325 which is made up of apertured lugs 326 and 32! welded to the forward side of the pipe member 3|5 in vertically spaced relation and a vertical bearing sleeve 328 welded to the lugs 325 and 321. A land axle supporting arm 33| is car- .ried by the bracket 325 and comprises a generally L-shaped arm 332 having one end rockably received in the sleeve member 328, the other end of the land axle arm 332 extending forwardly and havin a pair of apertured brackets 333 welded thereto, the brackets 333 carrying a vertical sleeve 334 in which the upper spindle portion 335 of a land wheel receiving axle 335 is disposed for rocking movement about a generally vertical axis. A land wheel 33! is mounted for rotation on the lower end of the land axle 336, the wheelreceiving portion of which is disposed rearwardly of the axis of rocking movement, as defined by the sleeve 3%, whereby the wheel 33! is free to caster. The rear portion of the land axle arm 332 that is rockably mounted in the bearing sleeve 328 is reduced in diameter below the arm 333. The outer end of the arm 339 is apertured so that when the land axle arm 332 is disposed in position on the frame section 3! the aperture in the outer end of the arm 339 seats over a lug 33! carried by the frame pipe member 3|5, and thus holds the axle arm 33! against lateral move- -ment. The land axle arm 33! is held in position in the bearing sleeve member 329 by a heavy cotter 342 or other suitable means, the cotter 342 thus holding the parts so that the arm 339 remains engaged with the lug 34 The rear end of the tiller is supported on a rear wheel unit indicated in its entirety by the reference numeral 350. The unit 35!! includes a rear frame arm 35! which is curved, as best shown in Figure 11A, and at its forward or laterally inner end is provided with a coupling plate 352 which is apertured at 323 (Figure 15), like the plates 3!! and 3|8, to receive the coupling bolts .323 carried by the coupling plate 3E8 at the rear end of the pipe member 3% which forms a part of the rear frame section 3! the rear frame arm 35! is flattened, as .at 355,

The rear end of and receives upper and lower clamp plates 356,

I the forward ends of which are welded or other- ,wise firmly fixed to the rear end of the rear frame arm 35 i. The rear ends of the clamp plates 3 356 are apertured, as at 351, and at the forward end portions the plates 356 are provided with slots 358.

A pair of bolts 359 disposed in the slots 353 and selected openings 35? serve to connect a rear axle bar 35! to the clamp plates 355.

The rear end of the bar 35! is apertured, as at 352, to receive a pivot bolt 333 by which a rear axle unit 354 is swingably. connectedwith the rear end of the'bar 35! to move about a generally vertical axis. The rear end of the unit 333 includes downwardly and outwardly extending ally connected at its rear end to the Quter end bolt 359 in the forward slots 353, and if more adjustment is needed, the rear bolt may be disposed in one of the other rear clamp plate openings 35]. The angle of lead of the rear wheel 312 may be adjusted by changing the effective length of the adjustable linkage 358. The coupling plate 352 is provided with a central aperture 315 in which the forward end of the rear frame arm is disposed and fixed thereto, as by welding. The parts are reenforced by a plate 315 welded to the frame arm 35! and the rear side of the coupling plate 352, as best shown in Figure 15.

The forward frame section 3| 2 comprises a pipe or tubular member 38! having a coupling plate 332 welded to the rear end thereof. The coupling plate 382 is apertured like the coupling plates 3|'|, 3|8 and 352, described above. This makes it possible, as will be pointed out in more detail later, to bolt the coupling member 382 directly tothe coupling plate 3!! when it is desired to eliminate the intermediate section 3|3.

A pair of upper and lower brackets 385 and 385 are welded to the front end of the forward pipe member 38!. These brackets are apertured to receive the rear or inner end 38! of a front furrow axle arm, indicated in its entirety by the telescopically adjustable link member 333 which at its outer end ispivoted to the forward end of the arm 392 and which at its inner end is pivotally connected into an aperture formed in a brackets 395 fixed to the front side of the pipe member 38! inwardly of the outer end portion of the latter. Adjusting the link member 39 serves to swing the front furrow wheel axle arm 383 generally inwardly oroutwardly relative to the line of draft so as to dispose a front furrow wheel 336, carried by the front furrow wheel axle unit 39 in the desired lateral position. structurally, the front furrow wheel axle unit 39! is similar to the rear axle unit 354 described above and comprises a spindle 397 which receives the wheel 3%, and a U-shaped part 393 which is apertured to receive a vertical tubular bearing 399, preferably welded to the member 393. The bearing 399'is adapted to be disposed on the forward end 389 of o o 389 carrying a'thru'st or abutment washer 43! the front furrowwheel axle arm 388, the section which bears against the upper end of the tubular member 393. One portion 'of the U-shaped part 393 is extended laterally, as at 332, to serve as 'a steering arm which is connected to be steered by the forward'pivoted drawbar member that forms a part of the hitch structure described below. i

The frame unit 3 0 is completed by one or more intermediate frame sections 3|3-where it is desired to provide a machine wider than one made up only of frame sections 3!! and 312.

Like the frame sections just mentioned, the frame section' 3|3 comprises a frame pipe or tubular menu-- ber'dilt having a coupling plate 43'! secured to e eeean end-softhemaimhitch or drawbar member 415;

drawbar straps I 8 are apertured to'receive =ahi-teh pin 419 whichconnects thenearend' of the drawbar member HE toxtherassooiated frame section 313 when the tiller is arranged'saashown inLFigures 11 and ll-A. 'The forward drawbar straps 4 I I extend forwardly from 1 the front: end *of the main drawbar member 1415 a substantial distance and are 'apertured to arece'ive anivotspin HI on which .allat'erally sw'ingable drawbararm 'unit flilis mounted. Theadrawbararm unit flZ includes upper :and lower :stop members 423' and 124, the latter havinga reerwardlyand laterally bent steering 'a'rm :section .4254 AIipivQt pin i l-26 is secured,zaslbywelding,,toltheouter endio'f the steering amrsec'tionilfi and receivesithe' forward end of a steering link assembly 4225, .therear end of which :is pivotally connected to the inner end or the'frontffurrowmheelxsteeiingarm-242M. The steering 'linkflfi includesa pairof telescopically associated members A2 8 and 429., the ziatterbeing tubular, sand the ztwo parts are rheld :in longitudinal adjustment 'arset s'screw collar 143i- :.or "other suitable .means. The tractor which :pulls thesdisk:narrowfis-representedhy atractor drawbarl32 towhichtheforwardendsiiof-the drawbar straps {42 3 and 42 4 "121B m'rvotally vconnected, as by :a hitch pin "43:3. The :main hitch or'drawbar :member lilliiiabraced (means :of a;.forward brace bar '44 I "the :rear end "ofwwhilch 15115916560131- ca'lly :associated with :a :rear :brace *tubeifll, the

end of :whichzis pivotally "connected :to :aperitured draft :lug M3. fixed to the forwardside of the :mainzirame pipe -member 38 I :A set vscrew collar 444 or other suitable means serves .to hold the parts N] :and 4 42 inanyrposition-of,longitu'dinal adjustment. Aswillbe bestseen from Figure :11, when the tractor is turned toward "one direction 1.01 theiother, the drawbar arm- 422 is :swung .in one direction L or the -other and ,;exerts "a pulltor thrust through the adjustable .Ilink aunit 42-1 .Lagainst :the steering :arm HIM, :thus vturning *the front t'furrow wheel 35min one direction or the other; When more than one :intermediate frame-section 313 is disposed between the-:rear

aandyfront frame sections 2M and -3I it vmaybe desirable to move the hitch structure 4L6 landwardly -intwh-ich case-the main .drawbar member 4:I 5: is pivotally connected to the draft lug Mao: -.the -.rear-most :frame section M13 wand-the rear end of the brace unit 442 .may .be connected to an auxiliaryadraft lug 44 3a (Figure 11) fixed to g-the forward side .of the frQntJIpipememberSB-I vnearwardly of the draft lug 443.

:Each @of the frame --sections 1-31 I 13 I2 I and. 3 I3 'JCaI'I'iES i-tsxownwgangnfi disks, thefrontirameseo- "t-ion 13112 carrying tworliskgangs. :Ea'ch gang, in-

dicated .bythe reference numeralfifl, comprises a plurality" of COIMZaVGrOOHWBX disks 45 I -:mounted iona gang :bolt 552:;and:heldimspaced:apartrrela- :tion :by wspoo'ls 1:453. (The :end s.-spool-s;-areiformed :asbearingsmembersfifi journaled ,fmtrotation'in hearing housing .456. Each 'hearingihousing #56 includes 1 a. forwardly extending tubular section 451 (Figure 13) inwhichthe rear end of an associated draft bail member 4'58 iisudisposed, being held in place :by any suitable means such as a pin lfil carriedlbytherear end of theba-il memb'erand extending into slots $62 in the -'bearing mem=ber 4E6.

Each bail member 458 includes a "forwardly disposed portion 465" which is disposed in a'bearing sleeve or tubular bearing member 465a carried in lugs 463 welded to the underside of the associated frame pipe-section. The forward end of each forward bail'portion Midisapertured to=receive a pin 4 6"Lor theflikewhichhol'ds the bail member in position. An arm 66 "15 *wlde'd or otherwise fixed to the -rear "portion of '-the forward section 4-35 of each bailmem'berfii! and cooperates :withthe assoc-iatedpinfl'fi l in' retairiingfthe bail' in position on the frame.

By virtue of the' bailmeans justdescribed; each =disk -gang 458 is swi'ngably connected the associated frame section for generally vertical movementrelativexthere'to whereby either =end'of *each disk gang swings vertically relative-t0 "the other end, thus providing" a flexible connection between each disk gang and the associated frame or support. "Since each frame section carries its own disk gang, the inclusion of an additional frame-section and -gang,-or the removal of one or more o'fthe frame sections and associated gangs, "may readily "be accomplished whenever" it is desired to vary the width of theIna-chine.

The adjacent bail members 458 "of proximate gangs 450 are interconnected by means of fa link 46B. best sh'owninFig'ures -11 andl'lAthe ends of 'each link 458 "are "o'fiset and the offset ends are apertured 'to receive pivots-carried by theassociated bail arms 46$. Thus, eaChlink *d fifl-interconnectsadjacent *bailswher'eby 'thead- 'jace'nt ends or eac'hpair of proximate disk "gangs "are' 'constrained 'to'move together. :Each link 4'68 is detachably "connectedwith the associated bail arm 458 by pivot means referred'to in detail below.

All of the disk 'gangs 4'50 "are adapted to .be raisedinto "transport position, or lowered into working-"position, "simultaneously -by raising and flowering means which preierably is carried by theframe:-structure 3110; Such raising andjlower- 1ingmeans comprises a series of interconnected lift rods "eachof which is indicated by the-reference numeral 416, ',Each member Mt. includes an elongated body-portion kill and 'a squared :head portion '418 (Figure 17) having a *round socket -4'19adapted toreceivethe endpof the ad- "iacen-tlift and member 416, which ;is apertured, "as-at .48 I 'to'receive a quickdetachable connectin pin or cotter 4.83 which is passed through. a

'pair oftheopenings-82 formed in "the *socketed head portion 418 of-the adjacent 'lift rod. 416. Each liftingrod'member1W5 is'substantiall-y equal in length toxjthelength of the: associated frame section; 311 or :3 I8.

As "best shown inj'Figures 1-11 and 12, the "for- -wardmost11ift-rod 416 carries a stud '484on which hem! :of athefront frame section 3.12,. The bell crank 496 comprises a main lever member 49! and a hammer strap member 492 welded to a stub shaft 493 with thehammer strap 492 spaced from the member 49! a distance sufficient to receive a pivoted link member 494 therebetween, the inner end of which is pivotally mounted on the upper end of the stub shaft 493. An abutment plate 496 is welded to the edges of the hammer strap 492 and the lever member 49! so as to serve as a stop for limiting the swinging movement of the link member 494 relative to the main bel'l crank member 49! in one direction, and when the link member 494 engages the stop 496, holes 491 in the several members come into registry. A pin 498 is welded to the outer ends of the bell crank member 49! and pivotally receives the forward end of the lift rod actuating link 485. An auxiliary opening 499 is formed in the end of the lever member 49!. The purpose of this additional opening is described below.

A power cylinder support 565 (Figure 11) is welded to the pipe 38! adjacent the bell crank 496 and extends generally in the normal line of travel of the machine in operation. The bracket 505 is reenforced by a brace strap 596, and the bracket 505 includes a forward extension 501 which turns upwardly, as at 598, and is apertured to receive the forward end of a power cylinder 5!0, which may be of any suitable conis carried. "When the power control unit 5 6 is in place and operated to bring the link 494 up against the stop 496, a pin 5" may be inserted through the registering openings 591. To bring the disk gangs in their raised position the unit 5!!! is extended its full amount. the opening 499 into registry with a short sleeve 5!!! welded on the forward portion of the pipe 38!. So long as the cylinder 5! is extended the link 494 isheld against the abutment 496, and the pin 5!1 takes no pressure. Therefore, when the disk gangs are held in their raised position, it is easy to remove the pin 5!1 from the openings 491 and place the pin 5!1 in the aligned openings 499 and 5l9. To remove the power unit 5l0, the latter is retracted slightly, the link 494 moving away from the stop 496 whereby the pressure of. the connecting pin against the bushing 5!6 is'relaxed. The other end of the cylinder 5!!) may then readily be disconnected from its support 598.

As will be clear from Figure 11, extension of the cylinder unit 5!0 causes right hand or forward movement of all of the interconnected lift rods 416. This movement is transmitted to the severa1 bail members 458 through swivel members 520 one of which is connected to each rear bail of the pairs of bails 458 that connect the several gangs to the frame 3H1. Each swivel member 520 includes a'tubular body portion 52! through which the associated lift rod 416 passes and a pair of trunnions 522 and 523, the latter being somewhat longer than the trunnion 522. The longer trunnion section 523 of each swivel member 520'is extended through the opening in the associated arm 466 on the rear hail of each This brings a relative to the tiller frame.

'bail member 498 abuts.

14 pair of bails. The trunnion section 523 of each swivel member also serves as a pivotal connection for the front end of the associated detachable connecting link 468 which is held detachably connected therewith by a cotter or the like, each link 468 serving to interconnect adjacently mounted bails, as explained above. When the cylinder unit 5H1 is extended and the lift rod sections 416 shifted forwardly, the head portions 418 (Figures 11 and 11A) on several lift rods engage the tubular portion 52! of each of the several swivel members 520 and, acting through the intermediate connecting links 468, thus serve to swing all of the bails 458 upwardly to raise the several disk gangs 45!! into their raised or transport position. At the forward end of the forward lift rod 416, a set screw collar 525 (Figures 11 and 12) is fixed on the rod 416 in a position to engage the tubular section 52! of the 'forwardmost swivel member 520 to raise the forward end of the forwardmost disk gang 459.

A compression spring 521 is disposed about each of the lift rods 416 immediately ahead of the associated swivel member 520, and a set screw collar 528 serves as an abutment by virtue of which retraction of the cylinder unit 5H], acting to force the lift rods 416 rearwardly, acts through the set screw collars 528 and the springs 52'! to yieldingly force the outer ends of the bail i members downwardly and thus hold the disk gangs to their work. However, if the terrain should be uneven either end of each disk gang may rise or fall relative to the other end to accommodate such unevenness. However, adja- 1 cent ends of the disk gangs move together by normally tends to run somewhat deeper than the rearmost end, it will be seen that the interconnecting links 468, which cause the ends of adjacent gangs to move up and down together. serve to balance the downthrust of the forward end of each gang against the upthrust of the rear end of the next forward gang. In order to keep the forward end of the forwardmost disk gang from running too deep, We provide adjustable stop means which will now be described.

An apertured bracket 54E is fixed-to a rear extension on the upper rear axle supporting bracket 38:1 and carries a crank screw 542, the lower end of which is threaded into a sleeve 543. A collar fixed to the crank screw 542 above the bracket and the detachable cotter or pin carried by the crank screw below the bracket 54! serve to prevent vertical movement of the crank screw 542 The lower end of the threaded bushing 543 is pivotally connected to a generally vertically disposed bell crank 545 swingably mounted on the axle portion of the forwardmost bail 459. The generally upwardly extending portion of the bell crank 545 carries an abutment stop 5549 with which the adjacent portion of the crank arm 466 on the forwardmost The bell crank 545 is normally held against movement by the crank screw542 and, as best shown in Figure 12, the

among-1 :forwardmost end-bf the -.-forwa1'd disk gang-=45!) prevented :from :running too de p, by virtue .of the :arm-l 66 coming into contact with theabutmentstop 5 16 on the bell crankl5dz5.

The :generaloperationof the form of the invention shown in Figures 11 et seq. is substantially the same as described above except that, of

course, turning-of the tractor relativeto the im- :plement will turn the frontfurrow *wheel through the steering linkage 421 and associated-parts. The lateral position of the for-wardend of the front furrow wheel supporting .member 3:88 may be adjusted by adjusting the effective length-of thelinkage 35 1. Second, the operating width-of the .machine may-be changed by taking out .or

adding frame sections 3113 and associated disk gangs. For example, if it should be desired to reduce the width of the machine shown in Fi ure .11, all that it is necessary to do .is to remove the bolts 3-23 holding the intermediate frame section iii-i in place and disconnect the associated links 46% and the associated .lift rod-section 416. Theforwardendof the rear lift rod 41 dmay then be connected withthe rear end of the/forwardmost lift rod 416 and one .of the links 468 connected between the forward .bail 453 for the rear.- most .gang to the-rear bail .of thesecond lift gang. If necessary, the lateral position .of the forward end of the hitch structure -4I.5 vmay be varied by adjusting the lengths, respectively, of

the bracing structure 44!, M2 andnthe steering linkage 42.1. If it should be desired to increase the operating width .of the machine an additional frame section .31 3, together with associated disk gangs and lift rods may be inserted either ahead .of -or behind the intermediate frame section 31.3 shown in Figure 11. If more than two or three additional frame sections are to be added, it may be desirable to .utilize,.-as one of the additional framesections, the frame section 3.! I, together with its land wheel I33?! and associated parts in order to provide/for. adequate support for such lengthened frame. .A frame reduced in length is shownin Figure 18.

While we have shown and described above the preferred structure in which the principles of the present invention have been incorporated, it .is to be understood that .our invention is not to be limited to the particular details shown and described alcove, but that, in fact, widely different means may be employed in the practice of the broader aspects of .our invention.

What we claim, therefore, and desire to secure byLetters Patent is:

l. A disk tiller comprising a,frame,.a plurality of axially aligned gangs of disks disposed generally rearwardly of said frame, an arm pivotally connecting each end of each, gang with said frame, each arm including a generally horizontal section lying rearwardly of said frame, a generally forwardly extending portion pivotally conneo'ted with said frame, and a generally rearwardly extending portion pivotally connected with the associated gang, said forwardly and rearwardly extending portions being offset laterally and the pivot axes .of the pivot connection ,between said portions and the frame and gang extendinggenerally transversely with respect to the lateral axes of both said frame and gang, and means connected with each arm for raising all of said gangs relative to said frame.

2. .Adisk tiller comprisinga support'a plurality of axially aligned disk gangs, an armrpivotally connecting each end of each gang to said. support, each arm extending generally horizontally-and zhavingva forwardly extendingportion atpneend and a generally rearw-ardly extendingportioniat "the other end, means rockably connecting. "one portion :of each .arm' with said support for movement relative thereto about :a transverse axis, means connecting-the other portion of each of said arms with the. associatedgangs for movement relative to the latter about an axis parallel to said vfirste-mentioned zaxis, whereby said gangs are capable of generally. vertical movement relative to said support, either end of each gang being movable, relative to said support, independently of'the other end, the axes of pivotal connection of said forwardly and rearwardlyextending arm :portions lyingfltransversely with :respect to ,said support .and gangs, and v:means .in- .terconnecting adjacent arms for movement .together relative to said support so :as to .causeradjacent ends --.of,-said gangs to move together.

3. An agricultural implement comprising an elongated support, an elongated ground engaging unit, a part movable -.on;said.support,.a pair of arms generally horizontally disposed pivoted .to .said support inspaced'apart relation along said support and each movable .relativez-to saidsupport about a transverseaxis, means -.pivoting said arms, respectively, to the end portions .nf said unit for movement about transverse axes spaced generally horizontally .along said. support from .said firstamentioned transverse taxes, FthB :axes :of

said pivotal connection of :each arm to said support and the associated .unit being generally transverse with respectto :said support and unit, stops 'on said part:engageable'withsaid arms when said part is'moved inone directionforraising said unit, and a pair of "spring meanscarried by said part and disposed in i-spaoed apart relationso as to act against said arms, respectively, whensaid part is moved in the otherdirection-f or yieldably holding each 'endof. said unit in its ground working position.

.4. A disk .tiller :comprising :a frame including a diagonally extending frame member, plurality of disk gangs "disposed in axially aligned relation with thefront endportion of one disk gang disposed adjacent the rear portion-of the next adj-acent disk gang, arm members ext'en'ding generallylongitudinally 'of :said frame member, each hingedl-y connected at its-forward end to :said frame member for generally up :and downswinging, means hingedlywconnectingthe rear portions of said i arm members. with the end portions of. said gangs, .s'aid arm members being rigid,

whereby, :draft may be-transmitted fromisai d frame member: tosa'id gangs; and means movably interconnecting the .arm members that are connected with contiguous. end p'ortions' of adjacent-gangs whereby the adjacent ends .of each pair of adjacent gangs-may rise or fall relative to the opposite end portions thereof.

5. A' disk tiller comprising :aframe-including .a generally diagonally -'exte nding frame" member, a plurality-of disk gangs arranged in axially aligned relation, ea-ch -disk gang'havinga hear- .ing adjacent each end thereof, :a plurality of spaced sleeve members :fixed to the :lowerportion of said frame -member in generally transverse position, a-plurality of arms, eachuhaving :a forwardly directed section irockablymounted in'ithe associated sleeve member-"on, the underside of said frame-member, :the rearport-ion-of each-of said arms having a rearwardly directed section, means on. each disk :gang bearing. for receiving the. rearwardly d-irect'edisection -:of the associated arm, whereby said arms serve to rcozm'ectsaid disk gangs with said frame member in draft transmitting relation, an extension on each of said arms extending generally directly upwardly, a swivel carried at the outer end of each of said extensions, and a rod member carrying means engageable with said swivels for swinging the latter and said arms to raise or lower said disk gangs.

6. A disk tiller comprising a frame including a generally diagonally extending bar having transverse journal members fixed to said bar in spaced relation, a disk gang having bearings at its end portions, each of said bearings having a transverse journal section, and a pair of arms pivotally connecting the end portions of said disk gang with said frame bar, each of said arms including a forward section rockably mounted in the associated journal member on said frame bar and a rearwardly directed section received in the associated journal member carried by the disk gang bearing, stop members fixed to the front and rear ends of said arms for holding the end portions of the latter in said journal members so as to provide for the transmission of draft between said frame bar and said disk gang while accommodating independent movement in a generally vertical-direction of either end of said disk gang relative to the other end, upward extensions fixed to the forward portions of'said arms and rockable with the latter adjacent the rear side of said frame bar, and means connected with said extensions for raising and lowering said disk gang.

7. A disk tiller comprising a frame including a generally diagonally extending frame member, a plurality of disk gangs arranged in axially aligned relation generally rearwardly of said diagonally extending frame member, each disk gang having a bearing adjacent each end thereof, a plurality of normally horizontal arms, each having a forwardly directed section rockably mounted on said frame member for movement relative thereto about a transverse axis and a rearwardly directed section, means on each disk gang bearing for receiving the rearwardly directed section of the associated arm, whereby said arms serve to connect said disk gangs with said frame member in draft transmitting relation with each end of each disk gang adapted to move independently, relative to said frame member, of the other end thereof, means interconnecting adjacent arms for causing them to swing together, whereby the adjacent ends of the associated gangs are connected to move generally vertically together, an extension on each of said arms extending generally upwardly and located adjacent the rear side of said diagonally extending frame member, and means carried by said frame member and connected with said extensions to raise or lower said disk gangs.

8. A disk tiller comprising a frame including a generally diagonally extending frame member, a plurality of disk gangs arranged in axially aligned relation, a pair of generally vertically swingable arms swingably connecting the end portions of each gang with said frame member, each of said arm means having its end portions offset laterally with respect to the longitudinal axis of said frame and said gangs, means interconnecting the adjacent arms of contiguous disk gangs, a part fixed to the rearmost arm of each of said pairs of arms, a part fixed to the forward arm of the forwardmost gang, gang raising and lowering means carried by said frame and including a member shiftable longitudinally of said frame'member, means connecting said member with all of said parts, and means on the frame for shifting said member.

9. A disk tiller comprising a frame including a generally diagonally extending frame member, a plurality of disk gangs arranged in axially aligned relation, a pair of generally vertically swingable arms swingably connected between the end portions of each gang and said frame member, means on the latter and each end of each gang for causing said arms to swing relative thereto about axes extending transversely of said gang bearings and said frame member, means interconnecting the adjacent arms of contiguous disk gangs, a generally upwardly extending part fixed at its lower end to each of said arms, a motion transmitting link connection between the parts fixed to each pair of contiguously disposed arms, whereby one end of each gang is constrained to move with the contiguous end of the next adjacent gang, rod means extending along said frame member and slidably connected with the forwardmost part and the rearmost part and with one part of each of said pairs of link-connected parts, an abutment carried by said rod means at one side of each of the parts with which said rod means is slidably connected, a spring carried by said rod means and disposed against the other side of each of said last mentioned parts except the forwardmost part, means on the forward end portion of said frame member for shifting said rod means in one direction so as to cause said abutments to engage the associated parts and swing said arms to raise said gangs, and in the other direction to act through said springs to yieldably force said gangs downwardly, and a tension spring acting between the forwardmost part and said rod means rearwardly of said forwardmost part.

10. A disk tiller comprising a frame including a generally diagonally extending frame member, a plurality of disk gangs arranged in axially aligned relation, a pair of generally vertically swingable arms swingably connected between the end portions of each gang and said frame member, means on the latter and each end of each gang for causing said arms to swing relative thereto about axes extending transversely of said gang bearings and said frame member, means interconnecting the adjacent arms of contiguous disk gangs, a generally upwardly extending part fixed at its lower end to each of said arms, a motion transmitting link connection between the parts fixed to each pair of contiguously disposed arms, whereby one end of each gang is constrained to move with the contiguous end of the next adjacent gang, rod means extending along said frame member and slidably connected with the forwardmost part and the rearmost part and with one part of each of said pairs of linkconnected parts, an abutment carried by said rod means at one side of each of the parts with which said rod means is slidably connected, and means on the forward end portion of said frame member for shifting said rod means in one direction so as to cause said abutments to engage the associated parts and swing said arms to raise said gangs.

11. A disk tiller comprising a frame including a generally diagonally extending frame member, a plurality of disk gangs arranged in axially aligned relation, each disk gang having a bearing adjacent each end thereof, a plurality of spaced sleeve members fixed to the lower portion of said frame member in generally trans- Verse position a plurality of v arms; each having: forwardly directed section rockably mounted in the associated sleeve member 011 the-under sid' of? said frame membem. the rear portion of eachor. said arms having a rearward'ly directed section, means on" each' dish" g-an'g. bearing; for rockably' receiving" the: rearwardly directed sectioncf: the associated arm-,. whereby said arms sewei to'conne'c't said disk gangs-with said'fra'me member in draft transmitting. relationgieachof said arm" sections extending" generally laterally: with respect: to; the longitudinal axes" of saidframeand" gangs and said sections being rela tively' offsetlaterally' with respect to one an: othen an extension om each of said arms ex@-- tending: generally directly upwardly; and-"means engageable with said extensions for swinging the 'latter and: said: arms to raise or lower said. dislegangsi 1 2.- The= invention set forth in: claim 8,. further characterized by means on each:- of said. parts for slide-my;- receivings'aid shiftablei member and abutments' -fixed: to said: shiftable' member: adzia cent-semi parts; whereby movement: o'fi said shiftiable member one direction acts to swing: all of" saide arms" and raise all of said gangs relative to said frame member:

18a. The invention set forth in c1aim' 12;.f-urther: characterized by spring means carried by saidshif table member adjacent all dfthe: parts 2o ahdta'otingz-against-the latter fdr yieldablw urging the: associated ends of the: gangs" downwardly 'whe1i said; shi'itabld member is moved im the other direction-e 14;= The invention 2 set forth in claim 8;; further characterized by said first mentioned" partsheiiigifixedto ohe forward'portionssof the associated arms adjacent the rear side of said frame memben and the rear ends of theassociated; bearing sleeves. v

References Citedinthe fileof this patent UNIEE'D srArEs PATENTS Number" Name Hate 1,216,123 Hqwe "Feb, 13;. 1917 1535919" Walton" Jury 5; 1927 15701833 Beda May22;,1928 1305:97 4 Campbell May 19", 1931 1 1 832,649 Orelind Nov. 117', 1931 1100 33483 Ban July 1 1935 23701425 Eii'gel a Feb. 9; I937 25245374 Wriite- J'u n'e 1'0, r941; 2,377,410" Field" Julie '5', 1'9'45' FOREIGN PATENTS Niirnoez Country Date 19514729 Australia Apr. 7", I930: 

